AI-generated Key Takeaways
- 
          RequiredSizeError is a type of ApiError used for validating Size in various services like CreativeService, CreativeSetService, and ForecastService. 
- 
          This error can occur if a required size is missing or if the creative association sizes are not a subset of the line item creative placeholders sizes. 
- 
          RequiredSizeError inherits fields from ApiError, such as fieldPath, fieldPathElements, trigger, and errorString. 
- 
          The specific reason for a RequiredSizeError is indicated by the 'reason' field, which can be REQUIRED, NOT_ALLOWED, or UNKNOWN. 
A list of all errors to be used for validating Size.
- Namespace
- 
               https://www.google.com/apis/ads/publisher/v202505
| Field | |
|---|---|
| ApiError(inherited) | |
| 
                            | 
                            The OGNL field path to identify cause of error. | 
| 
                            | A parsed copy of the field path. For example, the field path "operations[1].operand" corresponds to this list: {FieldPathElement(field = "operations", index = 1), FieldPathElement(field = "operand", index = null)}. | 
| 
                            | 
                            The data that caused the error. | 
| 
                            | 
                            A simple string representation of the error and reason. | 
| RequiredSizeError | |
| 
                            | 
 Enumerations 
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